US 11,670,460 B2
Electrolytic capacitor and manufacturing method thereof
Shinya Suzuki, Kyoto (JP); and Masahiro Kajimura, Osaka (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 16/651,899
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Sep. 27, 2018, PCT No. PCT/JP2018/036022
§ 371(c)(1), (2) Date Mar. 27, 2020,
PCT Pub. No. WO2019/065870, PCT Pub. Date Apr. 4, 2019.
Claims priority of application No. JP2017-189037 (JP), filed on Sep. 28, 2017; application No. JP2017-189038 (JP), filed on Sep. 28, 2017; and application No. JP2017-189039 (JP), filed on Sep. 28, 2017.
Prior Publication US 2020/0266005 A1, Aug. 20, 2020
Int. Cl. H01G 9/048 (2006.01); H01G 9/00 (2006.01); H01G 9/012 (2006.01); H01G 9/07 (2006.01); H01G 9/08 (2006.01)
CPC H01G 9/048 (2013.01) [H01G 9/0032 (2013.01); H01G 9/012 (2013.01); H01G 9/07 (2013.01); H01G 9/08 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrolytic capacitor, comprising:
at least one capacitor element including
an anode foil having a first part including a first end, and a second part including a second end,
a dielectric layer formed on at least a surface of the second part, and
a cathode part covering at least part of the dielectric layer;
an electrically insulating member insulating the first part from the cathode part;
a package body enclosing the capacitor element; and
an external electrode, wherein
the first part includes a porous portion,
at least a surface of the second part has a porous portion,
a thickness of the anode foil at an end face of the first end is the same as a thickness of the anode foil at the second part,
the package body includes a first filler,
the insulating member includes a second filler having a particle diameter smaller than a particle diameter of the first filler, or includes no filler,
the insulating member has an end A on a side of the first end and an end B on a side of the second part,
the insulating member includes a resin tape,
the end face of the first end and an end face of the end A are each exposed from the package body and the end face of the first end is in contact with the external electrode,
the external electrode has a first electrode layer and a second electrode layer formed on a surface of the first electrode layer, the first electrode layer covering the end face of the first end exposed from the package body, and
an end face of the second end is covered with the cathode part.